Which part of the eye photographic camera?
Lens
Iris
Retina
Eyelid
Correct Answer :
D. Eyelid
Related Questions
X-rays are used
in hospital in the treatment of malignant growth
to reveal hidden flaws in metal castings and welded joints
to detect alterations made in works of art
All the above
Which of the following can produce electricity?
resistor
thermocouple
light bulb
neon tube
The end product in the uranium disintegration series is
lead
zinc
carbon
tin
The end product in the uranium disintegration series is
lead
zinc
carbon
tin
Which of the following has the highest refractive index?
Crown glass
Water
Flint glass
Diamond
The escape velocity of a satellite projected from the surface of the earth is independent of
the mass of earth
the mass of the satellite
the radius of the earth
gravitation of the earth
The direction of heat flow between two objects depends on
their heat contents
their masses
their temperatures
whether they are in solid, liquid or gaseous state
The property of a fluid by which it resists relative motion within itself is known as
cohesive force
surface tension
diffusion
viscosity
When white light passes through a glass prism we get a spectrum on the other side of the prism. In the emergent beam the ray which is deviated least is
the violet ray
the red ray
the green ray
the blue ray
A pressure gauge for fluids is called
a hydrometer
a manometer
a lactometer
an anemometer
An electric kettle used for boiling hard water has a white scale deposited on its heating element. This consists or
sugar
sodium carbonate
common salt
carbonates of calcium and magnesium
When the disturbed electrons of an exited atom transfer back into lower energy levels they emit energy in the form of electromagnetic wave pulses called
neutrons
electrons
phonons
photons
The pressure of air at high altitude is less than the atmospheric pressure at the sea level. Hence the boning point of water at a hill top
is more than at sea level
is equal to that sea level
is less than at sea level
depends on the surrounding temperature
Commonly used safety fuse wire is made of
Tin
Lead
Nickel
An alloy of tin and lead
Acoustics is a property or
Physics
Chemistry
Biology
Economic
Sound waves in air are
transverse
longitudinal
transverse and longitudinal
neither transverse nor longitudinal
The source of electric energy in an artificial satellite is
mininuclear reactor
a dynamo
a thermopile
solar cells
When a bullet is fired from a gun
the gun moves forward
the gun jumps up
the gun does not move
the gun recoils with the same momentum as the bullet
On the Kelvin scale, the melting point of ice is
0 K
273 K
373 K
100 K
The electroplating of a metallic article
protects the article from atmospheric corrosion
gives it a more attractive appearance
Both (a) and (b) above
None of the above
In the electrical circuit of a house the fuse acts as
a thermopile
a load
a step down device
a safety device
The image of an object formed on the retina of the eye is
virtual and upright
virtual and inverted
real and inverted
real and upright
The weight of a body is
maximum at the equator
minimum at the equator
minimum at the poles
the same everywhere
Diamond shines because of its
purity
hardness
high density
high refractive index and low critical angle
Mercury is used in a barometer because
its density being very high 13.6 g/cm3 the height of mercury column is conveniently small
at the ordinary temperature its vapour pressure is small
it is opaque and does not wet glass
All the above
Antiparticle of electron is
proton
antiproton
positron
neutron
A hunter on the ground wishes to shoot a bird on a tree at a distance with his rifle. He has to point the rifle
at the lower elevation than the bird
at a higher elevation than the bird
in the same direction as the bird
vertically upwards
The rate of cooling of a hot body depends on
the nature of the radiating surface
area of the radiating surface
temperature difference between the body and the surroundings
All the above
When an electric bulb breaks, there la an explosive sound. That is due to
the chemical reaction between the gases inside the bulb
the compressed gases inside rushing out suddenly
the air outside rushing in to fill the vacuum inside the bulb
None of the above
The mass number and the atomic number of an element are X and Y respectively. The number oC neutrons in the atom of that element is
X
Y
X + Y
X Y